Improvement in time-locks



' in the case 4and the peculiar lever; and, furits spindle, and intermediate pinion.

Vsection on the line y y in Fig. 6.

ITEE STATES EMIL GEAR, 0E

TOLEDO, OHIO.

IMPROVEMENT INv TIME-LOCKS.

Specification forming part of Letters Patent No. 184,368, dated November 14, 187.6; application tiled May 26, 1876.

To alt whom it may concern:

Be it-known that I, EMIL GRAB, of Toledo in the county of Lucas and State ot' Ohio, have invented an Improvement in Time-Locks for Safe and Vault Doors, Of which the following is a specification:

The nature of my invention relates to an improvement in time-locks of that class wherein one or more clock movements are so arranged that they, or either of them, will permit the bolts of the door to be thrown ata certain interval of time after adjusting a dial connected with the clock-train.

The invention consists, rst, in a peculiar sliding stop-plate, provided with an opening and spring, in'combination with an opening ther, in the combination of the lever and the dial-knob, having two concentric grooves cut in its face, and an opening connecting said groove, as more fully hereinafter explained.

Figure 1, Sheet 1, -is an elevation of my lock with the case-door open. Fig. 2 is an elevation ot' the movement alone, the dial and dog being removed to show the parts behind them. Fig. 3, Sheet 2, is a sectional plan view of the front part of the clock-trains. Fig. 4 is a perspective view ot' the dial-knob, Fig. 5 is a similar view of the lever, looking at its rear side. Fig. 6 is an elevation of the sliding plate on one end of the lock-case.I Fig. 7 is a horizontal section of the same at a: w. Fig. 8 is an elevation of the center-wheel of one clock-train, and the click thereon. Fig. 9 is an elevation of the driving-pinion and its ratchet removed from the center-wheel arbor shown in the preceding figure, and Fig. 10 a In the drawing, A represents a metallic case to be secured to the inside of a safe or vault door. B is the front one of two plates of a double clock-train, C C, secured tothe back wall of the case. a a are the center-arbors of the clock-trains, upon each of which is mounted the center-pinion b, which, through the usual train, is slowly driven by the clockspring. c, Fig. 8, is a spring-pawl on the face side of each center-pinion b. D is a driving-l gear sleeved on each center-arbor a in front of the pinion b, and is provided with a ratchet, c', Fig. 9, on the back side, with which the pawl c engages, causing the gear D to be rotated with the train, but leaving it free to be turned back without damage to the train, (its Own,) whether its train be in motion or not. E is an intermediate pinion mounted on an arbor, F, journaled in the plates between the two trains, and this pinion meshes with the driving gears D D of both trains, and is rotated (with its arbor) by them in one direction. It' turned back, or in the other direction, by. hand, the gears D D will turn back on their arbors, slipping around under their clicks without disturbing the motions ofthe trains. If one train stops, the other will continue its motion and move the pinion E, and through` it carry aroundthe gear D of the other'movement. G is a iiat circular knob secured on the outer end of the arbor F, with two deep concentric grooves turned in its' face, the metal between them forming a diallfla'nge, G', through which, at one point, is cut an opening, d, so that'said dial-ilange then becomes a sector of a circle, which, as well as the outer flange, is divided oft'. E is a lever pivoted at c between lugs on the inner end wall of the case, its outer end projecting through a vertical slot in the other end wall of the case, which is nearest to the bolts of the door. The lever lies just in front of the dial-knob, 'and has a stud, f, Fig. 5, projecting'from the back side of the same, carrying an anti-friction sleeve, which stud projects into one orl the other of the grooves inthe face of the dial-knob.

It the slot d be brought coincident with the stud f the lever can -be lifted up, the stud passing through the said slot when the dialknob can be turned a little to the left, whereupon the studwill rest upon the sector-flange G', and thus support the lever in an elevated position until the arbor F has been revolved far enough by the clock-work to bring the slot d under the stud, which will then dropthrough it, bringing the free end of the lever into a lower position while the dial-knob continues to be rotated by the clock-trains. I is a sliding stop-plate, secured, by two screws, g g, Figs. l, 6, and 10, to the end wall ot' the case, which screws pass through slots h h and allow the said plate a limited vertical movement. i is a socket-opening in the end of the case, which receives the boltfshank when the door-bolts are thrown inward. 'i' is an opening in the sliding plate, which is coincidentwith.

the opening 'i when the plate is down, and through which the bolt-shank passes into the socket-opening t',- but when the plate I is up, the said opening i is covered by it, and the bolt cannot then be thrown. The outer end la of the lever passes through the lower part of a vertical slot in the sliding plate I, and on it rests a spiral spring, l, held in position by a screw, on, tapped down through the head ot' the plate. The said screw also serves to regulate the tension of the spring, so that it may lift up the plate when released, the lever being at the time in its elevated position. On'e or both of the dial-knob flanges may be laid oil' into hourly divisions, numbered from, say, 1 to 48, each mark representing the nurnber of hours required to bring the opening d under the stud f, so as to let the lever drop. The pendent part of the lever, coming between two hourly marks, serves as an index.

To lock `the door and set the lock so as to allow the bolts to be thrown after a givenV time, the lever being down, and the shank of the bolt being also in or through the openings i i', rst, wind up the movements by a keyr that will tit their winding-posts; next, turn the dial-knob to the left until its slot d is coincident with the stud f; then lift the lever and turn the dial to the left, when the lever will be supported by its stud resting on the sector-Hange, turning the knob until the time to open is indicated under the stud. The plate will be held down by the bolt-shank, thus compressing the spring l. Then close the casedoor, and shut the safe or vault door, and

lock it by shooting its bolts into the sockets of the door-frame inthe usual manner. When ed to be sustained in an elevated position for y a determinate or given period of time by one or more clock-trains within said case, substantially as and for the purpose set forth.

2. In a time-lock, substantially as described, the dial-knob G, having two concentric grooves cut inits face, and an opening, d, connecting the said grooves, in combination with the le-` ver H, for the purpose of holding such lever in an elevated position for adeterminate or given period of time, substantially as set forth and shown.

EMIL GRAH.

Witnesses:

G. I. SCOTT, J AMES MOORE. 

